condition mean min max ZT0-3 39.446522 39.446522 39.446522 ZT4-7 33.543347499999996 33.543347499999996 33.543347499999996 ZT8-11 39.008971 39.008971 39.008971 ZT12-15 39.269647500000005 39.269647500000005 39.269647500000005 ZT16-19 46.405608 46.405608 46.405608 ZT20-23 42.9207745 42.9207745 42.9207745